Match the term to the definition
Mass number
A total count of the neutrons and protons
Chemical symbol
A capital letter or a combination of a capital letter and a small letter that is used to represent an element
Periodic table
A chart that shows the classification of elements
Average atomic mass
An average of the masses of all the isotopes that occur in nature for an element
Isotopes
Atoms of the same element but with different numbers of neutrons
Transition metals
Elements in the middle of the periodic table, groups 4 through 7
Metals
Elements that are found on the left side of the periodic table
Metalloids
Elements that have some properties of both metals and nonmetals
Nucleus
The center of an atom where protons and neutrons are located
Period
The horizontal rows of elements
Atomic mass
The number of protons in an atom
Electrons
The particles that move about about the nucleus and have a negative charge
Electron cloud
The region around the nucleus occupied by electrons
Groups
Vertical columns of elements